C / C++ / MFC

void CMyTreeView::OnPaint() 
{	
	if(IsWindowVisible())
	{
		CPaintDC dc(this);
		 
		CRect rcClip, rcClient;
		dc.GetClipBox(&rcClip);
		GetClientRect(&rcClient);
 
		// CREATE A MEMORY DC COMPATIBLE WITH THE PAINT DC.
		CDC memDC;
		memDC.CreateCompatibleDC(&dc);
 
		// SELECT A COMPATIBLE BITMAP INTO THE MEMORY DC.
		CBitmap bitmap;
		bitmap.CreateCompatibleBitmap(&dc, rcClient.Width(), rcClient.Height());
		CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);
		memDC.SelectObject(&bitmap);
 		
		// SET THE CLIP REGION TO BE THE SAME AS THAT IN PAINT DC.
		CRgn rgn;
		rgn.CreateRectRgnIndirect(&rcClip);
		memDC.SelectClipRgn(&rgn);
		rgn.DeleteObject();
 		
		// FIRST LET THE CONTROL DO IT'S DEFAULT DRAWING.
		CWnd::DefWindowProc(WM_PAINT, (WPARAM)memDC.m_hDC, 0);
 		
		// IF TRUE DRAW A RED BORDER AROUND OUR TREE CONTROL.
		if(m_bColor)
		{
			CRect border;
			GetTreeCtrl().GetClientRect(&border);

			memDC.FillSolidRect(0,0,1,border.bottom, RGB(255,0,0)); // LEFT
			memDC.FillSolidRect(0,0,border.right,1, RGB(255,0,0)); // TOP
			memDC.FillSolidRect(border.right-2,0,2,border.bottom,RGB(200,0,0)); // RIGHT
			memDC.FillSolidRect(0,border.bottom-2,border.right,2,RGB(200,0,0)); // BOTTOM
		}
 
		HTREEITEM hItem = GetTreeCtrl().GetFirstVisibleItem();
		while(hItem)
		{
			CRect rect;
			UINT selflag = TVIS_DROPHILITED | TVIS_SELECTED;
			Color_Font cf;
		
			if (!(GetTreeCtrl().GetItemState(hItem, selflag) & selflag) 
				&& m_mapColorFont.Lookup(hItem, cf))
			{
				CFont *pFontDC;
				CFont fontDC;
				LOGFONT logfont;
				
				// USE WINDOW FONT.
				CFont *pFont = GetFont();
				pFont->GetLogFont(&logfont);

				if(GetItemBold(hItem))
					logfont.lfWeight = 700;
				
				fontDC.CreateFontIndirect(&logfont);
				pFontDC = memDC.SelectObject(&fontDC);

				if(cf.color != (COLORREF)-1)
					memDC.SetTextColor(cf.color);
				
				CString sItem = GetTreeCtrl().GetItemText(hItem);
				GetTreeCtrl().GetItemRect(hItem, &rect, TRUE);
				
				memDC.SetBkColor(RGB(255,255,255));
				memDC.TextOut(rect.left+2, rect.top+1, sItem);
				
				memDC.SelectObject(pFontDC);
			}

			hItem = GetTreeCtrl().GetNextVisibleItem(hItem);
		}

		dc.BitBlt(rcClip.left, rcClip.top, rcClip.Width(), rcClip.Height(), &memDC, 
					rcClip.left, rcClip.top, SRCCOPY);

		memDC.SelectObject(pOldBitmap);
		pOldBitmap->DeleteObject();
		
		memDC.DeleteDC();
	}
}

BOOL CMyTreeView::OnEraseBkgnd(CDC* pDC) 
{
	pDC = NULL;
 
	return TRUE;
}